How to Make Relay Injector Security

How to Make a Relay Injector Security

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Disabling the fuel injectors is a good way to make a security system for your vehicle. This circuit or wiring arrangement uses a relay to control the voltage and current going to the injectors. Most, if not all injector systems are fed battery voltage on one side and the ECM pulses a ground on the other side. The 12 volts is fed through a vehicle system relay, which is triggered via the ignition switch. The system wiring explained here is just an extension of the system already in the car. Your only difficult job is to find that one single wire that caries the 12 volts for the injectors. If you have no wiring diagram, you can always follow one of the injector wires until it becomes a single wire and then insert the circuit here.

The circuit here uses two relays and works as follows:

We'll use a turn ON button arrangement, as seen in our first article. Please, refer to it for an in-depth analysis. Find the injector main power feed wire. If necessary, follow one of the injector wires until you find the main splice. You'll need to cut the main injector feed wire. Then, from the cut wire, connect the battery feed side to terminal 30 of the first relay. Afterwards, connect terminal 87A of the same ....

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